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United States Patent | 6,128,564 |
Graf | October 3, 2000 |
The invention relates to a drive train controller of a motor vehicle which has an engine and an automatic transmission. The drive train controller has an engine controller for controlling variables affecting engine torque and a transmission controller for controlling shifting events of an automatic transmission. There is an interface interconnecting the transmission controller and the engine controller for allowing constant communications between the transmission controller and the engine controller. The transmission controller transmits a correction term M.sub.kor to the engine controller over the interface for controlling a magnitude of the engine torque. The transmission controller transmits a time constant to the engine controller via the interface for controlling the dynamic behavior of the engine torque. In this manner, the transmission shifts smoothly between gears.
Inventors: | Graf; Friedrich (Regensburg, DE) |
Assignee: | Siemens Aktiengesellschaft (Munich, DE) |
Appl. No.: | 104506 |
Filed: | June 25, 1998 |
Jun 25, 1997[DE] | 197 27 044 |
Current U.S. Class: | 701/51; 477/102; 477/107; 477/109; 701/53; 701/54 |
Intern'l Class: | G06F 017/00 |
Field of Search: | 701/51,52,53,54,57 477/109,110,107,102,33,93,98,155 |
4819187 | Apr., 1989 | Yasue et al. | 701/54. |
4945481 | Jul., 1990 | Iwatsuki et al. | 701/54. |
5025380 | Jun., 1991 | Wataya et al. | 701/104. |
5228368 | Jul., 1993 | Kato et al. | 477/33. |
5307270 | Apr., 1994 | Graf | 701/54. |
5323667 | Jun., 1994 | Tweed et al. | 477/107. |
5335568 | Aug., 1994 | Kammerl et al. | 477/109. |
5369584 | Nov., 1994 | Kajiwara | 701/48. |
5396420 | Mar., 1995 | Graf | 701/55. |
5421305 | Jun., 1995 | Tomisawa | 123/435. |
5547434 | Aug., 1996 | Graf et al. | 477/109. |
5749060 | May., 1998 | Graf et al. | 701/51. |
5822708 | Oct., 1998 | Wagner et al. | 701/54. |
5997434 | Dec., 1999 | Graf et al. | 477/98. |
6026342 | Feb., 2000 | Graf et al. | 701/51. |
Foreign Patent Documents | |||
0 342 643 | Nov., 1989 | EP. | |
0 518855 B1 | Sep., 1991 | EP. | |
2934477 C3 | Oct., 1987 | DE. | |
2935916 C2 | Dec., 1989 | DE. |
German Published Non-Prosecuted Application DE 40 37 092 A1 (Runge W. et al.), dated May 27, 1992. International Publication WO 91/13780 (Graf, F.), dated Sep. 19, 1991. Abstract. |